Central Retinal Vein Occlusion

PRESENTED TO OD students of 5

semester pef university college

by kausar Ali

CRVO

When blood vessels to the retina are blocked it is known as a retinal vein occlusion or ‘eye stroke’, 

A retinal vein occlusion is a blockage of the blood vessels that feed the retina, and can result in sudden and serious vision problems.

CRVO The central retinal vein is the venous

equivalent of the central retinal artery and, like that blood vessel, it can suffer from occlusion (central retinal vein occlusion, also CRVO), similar to that seen in ocular ischemic syndrome. Since the central retinal artery and vein are the sole source of blood supply and drainage for the retina, such occlusion can lead to severe damage to the retina and blindness, due to ischemia (restriction in blood supply) and edema(swelling).

CAUSE

It can also cause  glaucoma. sudden blindness. Nonischemic CRVO is the milder form of

the disease. It may progress to the more severe ischemic type

Treatment

Treatment consists of Anti-VEGF ( Vascular endothelial growth factor )drugs like Lucentis or intravitreal steroid implant (Ozurdex) and Pan-Retinal Laser Photocoagulation usually. Underlying conditions also require treatment. Non-Ischemic CRVO has better visual prognosis than Ischemic CRVO.

A systematic review studied the effectiveness of the anti-VEGF drugs ranibizumab and pagatanib sodium for patients suffering from non-ischemic CRVO. Though there was a limited sample size, participants in both treatment groups showed improved visual acuity over 6 month periods, with no safety concerns.